Multiple bolt mechanism



D United States Patent [111 3,545,799

[72] Inventor Abnlnn Gertsfeld [56] References cm ax: 1"- 1M s UNITED STATES PATENTS m] A l No 3'' 932,330 8/1909 Ratchford 70/118 [22} m,- m" 1969 15301979 4/1919 Schenwald 70/120X Patented 1970 1,319,011 10/1919 Kuretich 292/36 1,480,181 1/1924 Mueller... 70/118X Continuation-impart of her. No. 727,478, Ma 8 1968 b d n d 1,670,277 5/1928 Albach 70/118 Y e 1,908,980 511933 lleyel 70/120 1,977,853 10/1934 Kemp 70/118 Primary Examiner-Marvin A. Champion 7 Assistant Examiner-Edward J. McCarthy s4 Attomey-Huebner and Worrel 7 Clubs, 14 Drawing Figs. [52] US." 292/34; APSTRACT: A multiple lock mechanism includingaplurality .70/120 01 cam actuated bolt members. The bolts are adapted for [51] Int. Eo5b 63/14; simultaneous movement to a locking or unlocking position. 1305c 1/06 The simultaneous movement of the respective bolt members is Field Search 292/34, 37, accomplished through a single actuating; sliding cam. Additionally, retaining means are provided to; prevent disengagement of the bolt members when in a locked position.

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MULTIPLE BOLT MECHANISM This is a continuation-in-part of copending application Ser. No. 727,478, filed May 8, 1968, now abandoned for a MUL- TIPLE BOLT MECHANISM.

BACKGROUND or THE INVENTION While there have been some prior art devices which utilize a plurality of locking bolts oh house doors, warehouse doors, and garages, these devices have the disadvantage in being cumbersome and involving a multiplicity of cranks or levers for actuation of the locking bolts.

In some cases, the prior art devices require separate movement of the respective locks or at least multiple movement of handles to effect a complete locking by the respective locking bolts.

SUMMARY OF. THE INVENTION A multiple lock mechanism which includes a plurality of cam actuated bolt members slidably mounted in a housing. Within the housing there is also provided a sliding cam plate which is adapted to engage cam followers whereby the cam followers will be urged normal to the line of travel of the cam plate. The cam followers are each connected to bolt members, and compression springs are associated therewith to bias the bolt members in a normally unlocked position. An internal handle means is provided on the housing for manual rotation of the sliding cam plate and simultaneous movement of the bolt members for locking or unlocking. A lock engageable by a key may be provided on the outside to activate the sliding cam plate. Retaining means are also provided to prevent dislodgement of the bolt members and sliding cam plate when in a locked position. i

It is an object of this invention to provide a burglarproof multiple lock mechanism wherein a plurality of bolt members, moved in opposed directions from each other, engage keepers when in a locking position.

Another object of the invention is to provide a cam plate means which will simultaneously move the respective bolt members in opposed directions for locking, and toward each other for unlocking.

A further object of this invention is to provide a multiple lock mechanism which can be adapted for use with conventional doors, sliding glass doors, windows, garage doors, etc.

Other objects, aspects and advantages of the invention will become apparent from the following description taken in connection with the ace ampanying drawings.

BRIEF DES CRIPTION OF THE DRAWINGS FIG. 1 is an elevational environmental view of a conventional wooden door with the multiple lock mechanism of my invention mounted therein; i

FIG. 1a. is an ele vational environmental view of a sliding glass door with a mddified multiple lock mechanism of my invention mounted therein;

FIG. 2 is a crdss-sectional view of the multiple lock mechanism and ass iated keeper of a door jamb taken on line 2-2 of FIG. 4, and illustrating the multiple lock mechanism in an op n or unlocked position;

FIG. 3 is a view s milar to FIG. 2, but showing the multiple lock mechanism inl cked position;

FIG. 4 is a cjrdss-sectional yiew of the multiple lock mechanism as illustiated in FIG.' 2, taken on line 4-4 of FIG.

2; r I FIG. 5 is an exp] ed fragmentary detailed cross-sectional view of a portion 0 the internal means for moving the bolt members to a locke or unlocked position;

FIG. 6 is an enla ed fragmentary environmental view of a modified form of th multiple lock mechanism as illustrated in FIG. la.

FIG. 7 is a top cross-sectional view taken on line 7-7 of FIG. 6 of a modified multiple lock mechanism;

FIG. 8 is a modified fonn of multiple lock mechanism in an open or unlocked position;

FIG. 9 is a view similar to FIG. 8 of the modified multiple lock mechanism in a closed or locked position;

FIG. 10 is a cross-sectional view of a further modified multiple lock mechanism illustrating the principle of my invention;

FIG. 11 is a cross-sectional view of the multiple lock mechanism including retaining means for the bolt members, illustrating the multiple lock mechanism in a locked position;

FIG. 12 is a cross-sectional view of the multiple lock mechanism as shown in FIG. 11, illustrating the multiple lock mechanism in an open or unlocked position; and

FIG. 13 is a cross-sectional view of the multiple lock mechanism illustrated in FIG. 11 taken on line 13-13 of FIG. 11.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to the drawings in detail, FIGS. 1 and la environmentally illustrate a .multiple lock mechanism 20, and modified lock mechanism 20 mounted in a conventional hinged wooden type door 21, and sliding glass door 22, respectively. For purposes of location, like references will be used for the door structures which do not form a part of the in vention.

Each of the door frames includes a sill 24, header 26, and door jambs 28 and 30. The door 22 includes two sliding glass panels 32 and 34.

The invention, which consists of the multiple lock mechanism 20, may be adapted for not only locking a conventional wooden house door, garage door, or any type of closure for an opening where it is particularly desirable to thwart malicious or unlawful entry.

When the multiple lock mechanism 20 is used in a manner where it is desirable to have an exterior as well as an interior means to activate the mechanism, a conventional key lock cylinder 36, such as is illustrated in FIG. 4, may be employed on the exterior of the lock mechanism so that the only means for activating the mechanism 20 would be by means of a key 38. On the interior of the structure any type of conventional handle 40 may be employed to activate the multiple lock I mechanism 20.

The multiple lock mechanism 20 is illustrated in detail in FIGS. 2 through 5 of the drawings and includes a housing 42 which is adapted to be mounted in the door structure such as the door 21. This housing includes a pair of parallel, spaced apart, side walls 44 and 46, generally rectangular in shape. Preferably, the housing is a two-piece structure which may be joined together by means of fastening rivets 48. The housing 42 also includes a generally U-shaped bolt member retainer extension or retainer 50, which is adapted to extend from a jamb plate 52 into a recess 54 within the door jamb 30. The jamb plate 52 is preferably flush with the vertical edge of door 21, and has an opening 53. The multiple lock mechanism and bolt members are contained within the housing 42.

Mounted within the housing 42 is a cam means generally designated 56, which is adapted to engage multiple bolt members 58 for locking or unlocking. The cam means 56 includes an elongated cam plate 60, which is adapted to slide within the housing 42 through the jamb plate 52. The cam plate is retained within the housing by means of guide post 62 which engages the exterior of the cam plate 60 and an interguide post 64 which projects from the wall 44 to the wall 46 of the housing, and is received in an elongated slot 66 of the cam plate 60. Additionally, the cam plate 60 includes a cutout section 68 having cam surfaces 70 and 72.

The cam plate 60 adjacent the jamb plate 52 includes a pair of rounded shoulders 74, and reduced neck portion 76, which form a bolt means to be described. The neck portion 76 is of a length which will not project through the bolt member retainer extension 50 when the cam plate 60 is in a retracted or open position such as is illustrated in FIG. 2.

Thus, it may be said that the cam plate 60 has a sliding axis which extends normal to the jamb plate 52;

Mounted within the bolt member retainer extension 50 are a pair of opposed bolt members 58, each of which includes an elongated shank 78 having a cam follower 80 mounted on one end of the shank 78. The opposite end of the shank 78 forms the bolt which will project through complementary openings 82 in the retainer 50. The cam followers 80 each includes a rounded shoulder portion 84 which is engageable by the rounded shoulders 74 of the sliding cam plate 60. Surrounding the shank 78 of each of the bolt members is a compression spring 86 which is biased against the cam follower 80 and the interior of the bolt member retainer extension 50, so that the bolt members 58 will be urged to an open position, such as is illustrated in FIG. 2.

Mounted within the door jamb 30 and the recess 54 thereof, are opposed keepers 88, each of which includes an opening 90, adapted to receive the bolt 58. Additionally, the door jamb 28 is provided with an opening 92 which is adapted to receive the neck portion 76 of the cam plate 60.

Thus, it can be seen that by moving the cam plate 60 from an open or unlocked position, such as seen in FIG. 2, to a closed or locked position, such as shown in FIG. 3, the cam plate 60 will slide forward toward the door jamb whereby the rounded shoulders 74 of the plate 60 will engage the shoulders 84 of the cam followers 80, and impart movement to the cam followers 80, shanks 78, and bolts 58, in a direction normal to the sliding axis of the cam plate 60 whereby the bolts will become engaged within the keepers 88, and the structure will become locked. In addition to the opposed bolts 58, the neck portion 76 of the plate 60 will engage the Opening 92 within the door jamb, thus effecting a three-way locking of the door, window or other structure.

. In order to achieve and slidably move the cam plate 60 from its open position, such as seen in FIG. 2, to a locked position as illustrated in FIG. 3, there is employed an engaging means 94. This engaging means includes a shaft 96 secured to the handle 40, and projecting through wall 46 into the housing 42.

The shaft terminates approximately midway between the sidewalls 44 and 46. The shaft 96 includes a pair of opposed key slots 98, best seen in FIG. 5. Mounted on the shaft 96 is an O-rlng washer 100, including opposed keys 102 which are adapted to slide within the key slots 98 and lock the shaft and O-ring washer for simultaneous movement.

There is additionally provided a snap ring 104 in the shaft 96 to prevent vei'tical movement of the O-ring washer 100. Positioned on top of the O-ring washer 100 is a cap washer 106. this cap washer includes an annular flange 108, forming a recess within the washer 106 complementary to the exterior diameter of the O-ring washer 100. It should be noted that the flange extends a very short distance down the side of the O- ring washer, as again best seen in FIG. 5. The cap washer 106 includes a slot 110, generally in the shape of a cross which is adapted to overlie a corresponding slot 112 extending inwardly from the top of shaft 96.

The slots 110 and 112 are adapted to receive a conventional cylinder lock bar 114 which extends from the conventional cylinder lock 36. Thus, when a key 38 is inserted within the conventional lock cylinder 36 and rotated, the cylinder lock bar will rotate, which in turn will rotate the cap washer 106 and the shaft 96, which will cause the O-ring washer 100 to rotate, in view of the fact that it is keyed to the shaft 96.

The reverse is also true that with the rotation of the handle 40, the shaft will rotate, causing simultaneous rotation of the O-ring washer 100 and cap washer 106.

The cap washer 106 also includes a projecting finger 116 which is adapted to strike the cam surface 72 of the cam plate 60 when the handle 40v is rotated or the key 38 is turned within the lock cylinder 36, thus moving the cam plate 60 to the position as illustrated in FIG. 3.

In order to provide holding means for the cam plate 60 in either an open or closed position, the O-ring washer 100 includes a pair of opposed projecting lugs 118 which act as stops. Adjacent to each of the lugs 118 are recesses 120 which are engageable by a leaf spring 122 mounted in the housing 42. The spring 122 extends between a pair of stoppins 124 and can be seated within the-recess 120. It is preferable that the recesses 120 be arcuate so as to reduce friction whereby the spring may be disengaged from the recess when the handle is turned, moving the cam plate 60 from an open to a closed position. Without the spring being seated in the recess 120, as shown in FIG. 2, there is the possibility of the cam bolt being inadvertently slid to a closed position, and the same is true with the spring in the opposed recess 120: when the cam plate is moved to its forward or locked position, it may become unlocked. In other words, all of the mechanism will be retained in position v until enough force, such as by a key or a turning of the handle 40, will dislodge the spring from the recess 120.

Without this form of holding means, the engaging means-.94 would be free to rotate and allow the cam plate 60 to bemoved to an open or unlocked position because of thetension' placed on the springs 86 when the bolts 58 are in the locked position as seen in FIG. 3.

FIGS. 6 through 9 illustrate a modified form of the multiple lock mechanism wherein there are only employed two opposed locking bolt members instead of the three as illustrated and described in the preferred embodiment of FIGS. 1 through 5.

The engaging means 94' is identical to the engaging means 94, as described with relation to the preferred embodiment.

In the embodiment of FIGS. 6 through 9, the cam plate 60' is slidably mounted as before described, but does not include a neck projection. Instead, the rounded shoulders 74' join together in a pointed tip 126 between opposed cam followers By the use of the pointed tip 126, the bolts 58' will offer less resistance to the sliding cam plate 60', and the coefficient of friction is greatly reduced. In other words, the tip 126 will actually start the opposite movement of the cam followers 80' prior to the engagement of the shoulders 74' with the rounded shoulders 84' of the cam followers 80'.

In addition, this modification includes the pivotal mounting of the cam follower 80' to the shank 78' by means of a pivot pin 128, which extends through the cam follower and the v shank 78. In this way, the cam followers are allowed to pivot and better engage the cam plate 60', which again will help to reduce the coefficient of friction when the bolts are moving in directions normal to the axis of sliding movement of the cam plate 60'. FIG. 9 illustrates the modified form as just described in a locked position.

The structure illustrated in FIGS. 6 through 9 would be better adapted for use in a sliding door where a third bolt, extending on the axis of the movement of the plate 60' would serve no useful purpose when the sliding door itself would move on the same axis as the reduced neck portion 76.

FIG. 10 illustrates a second modified form of the multiple lock mechanism wherein the cam plate 60" does not directly engage cam followers 80 but has a bell crank associated with it to move the bolts 58" in opposed directions normal to the travel of the cam plate 60'.

Adjacent the end of the cam plate 60" are a pair of cranks 130 which are pivotally and overlappingly connected to the plate 60" by means of a crank pivot pin 132. Each of the opposite ends of the cranks 130 is pivotally connected to a cam follower 80" by means of pins 134.

Thus, when the cam plate 60" is slidably moved toward the door jamb 30", the cranks 130 will pivot, urging the opposed bolts 58" into the keeper 88". Additionally, with the recesses on the engaging means 94", the cam plate may be locked so that it cannot move beyond center, whereby the bolt members 58" would become disengaged from the keepers 88.

FIGS. 11 through 13 illustrate a further modificationof the multiple lock mechanism identified as 20" including a housing 42" which is adapted to be mounted in a door structure. Preferably, the housing is a two-piece structure such as shown in FIG. 13 with a closure side plate 44" and opposed wall 46". The housing 42" and theside wall 44" may be joined together by means of fastening rivets 48 The cam means generally designated 56" is similar inconstruction to'the cam means illustrated in FIG. 2 and includes an elongated cam plate 60" which is adapted to slide within the housing 4 through'a front jamb plate 52". The cam plate 60" is'i'etained within the housing 42" by means of a guide post 64" which projects from the side wall 46" and is received in an elongated slot 66" of the cam plate 60".

Additionally, as in FIG. 2, the cam plate 60" includes a cutout section 68" havinga forward cam surface 70" and a rear cam surface 72". Y I

The cam plate 60" includes'a pair of rounded shoulders 74"" and a reduced neck portion 76" which form a bolt means to be described. The neck portion 76" is of a length which will not nonnallyfproject through the jamb plate 52", when the cam plate 60" is in a retracted or open position such as illustrated in FIG. 12.

Additionally, the cam plate' 60" includes opposed inwardly curved cam surfaces 75 which are extensions of the rounded shoulders or cam portions 74' Additionally, the cam-plate 60" includes a pair of opposed retaining means or holding members designated 150 which are extensions of the cam plate 60f" and include a hook portion 152 adapted to engage the cam followers 80" of the opposed bolt members 58". I

As may be seen from FIG. 11, when the bolt mechanism is in a locked position, where the respective bolt members 58" engage the keepers, they will be locked within the retaining means 150, such as shown inFIG. 11 to prevent unwanted dislodgement from the keeper 80".

There is also provided an additional retaining means or holding means 154 to prev'enthorizontal dislodgement of the cam plate 60" when inalocked position, such as shown in FIG. 11. The retaining. means 154 includes an elongated generally horizontal bottom bar 156 having an upward vertical end extension 158 forming a hook or lock means whereby the upper surfaee1160 of the elongatedbottom bar 156 and the vertical inner surface l62 of the extension 158 engage the cam plate 60" as best seen inFIG. 11. When in this position, the cam plate 60" will be prevented'from disengaging horizontal movement. Additionally, the retaining means 154 includes an upwardly projecting plate 164 from the upper surface 160 and is provided with a vertical extending slot 166. Projecting from the wall 46" is a guide pin 168 which extends into the elongated slot 166 to maintain the retaining means in proper position. l

As can be seen from FIG. 13, the vertical extension arm 164 is offset and is received within a recess 170 of the cam plate 160". Generally, the arm 166 is in sliding contact with the surface 172 of the recess 170.

There is also provided a spring holding member 174 which includes a vertically mounted spring 176 extending from the bottom of the housing 42" upwardly engaging the elongated bottom bar 156. A'pin 178 extends from the elongated bar 156 to aline and hold the spring 176 in a biasing position.

In operation, when the engaging means 9 which cam be the same as the means illustrated in FIG. 2, are rotated, the

projecting finger 116" is adapted to strike the front surface 70" which will move the cam plate 60" to the elongated position, as shown in FIG. 11, which will cause the retaining means-150 and 154 to engage the respective parts and prevent disengagement of the bolt members from the keepers.

In'order to open the lock to a position such as shown in FIG. 12, the engaging means 94 are rotated whereby the striking finger 116" will engage the top surface 167 of arm 164, forcing the arm and elongated bar 156 downward, compressing the spring 176 so-that the extension 158 will become disengaged from the cam plate 60" As the engaging means 94" is rotated rearwardly, the striking finger 116" will engage the surface 72" moving the cam plate 60" rearwardly whereby- While a retaining pin 178 is preferred to maintain the spring 176 in proper vertical alignment any means such as a bore within the elongated bar 156 may be utilized without departing form th' spirit of the invention.

though the invention has been herein shown and described in what is conceived to be the most practical and preferred embodiment, it is recognized that departures may be made therefrom within the scope of the invention.

Iclaim:

1. In a multiple bolt mechanism adapted to engage a corresponding number of keepers wherein there are a pair of opposed bolts adapted to be moved coaxially into and out of engagement with one of said keepers and a single bolt adapted to be moved normal to the axis of said opposed bolts into and out of engagement with one of said keepers wherein said bolts are mounted in a housing within a'door and said keepers are mounted in an adjacent door jamb comprising the improvements of said keepers defining a recess in said door jamb; said housing extending outward of said door and adapted to project into said recess when said door is closed; each of said opposed bolts including a cam follower element fixedly mounted on an end of said bolt remote from the portion adapted to engage said keeper; each of said opposed bolts including a spring surrounding said bolt and bearing against said housing and said cam follower biasing each of said opposed bolts toward each other and inwardly of said keepers; a cam plate means having corresponding opposed cam surfaces each of which continually engages a respective cam follower, said single bolt being a projection of said cam plate means interrupting said opposed cam surfaces; rotatablecam engaging means adapted to slide said cam plate means within said housing normal to the axis of said opposed bolts'and move said pair of opposed bolts in opposed directions as well as moving said single bolt normal to the direction of movement of said pair of bolts.

2. In a multiple bolt mechanism as defined in claim 1 the inclusion of a tension spring removably engageable with said rotatable cam engaging means for maintaining said cam engaging means in alternate positions whereby the bolts are maintained in a locked or unlocked relationship.

3. In a multiple bolt mechanism, as defined in claim 1 wherein releasable retaining means are provided to prevent dislodgement of said bolts from said keepers.

4. In a multiple bolt mechanism as defined in claim 3 wherein said releasable retaining means includes a stop member adapted to engage said cam plate means when said single bolt is in engagement with said keeper and prevent dislodgement of said bolt from said keeper.

5. In a multiple bolt mechanism as defined in claim 4 wherein said stop member includes an extension arm projecting into the path of said rotatable cam engaging means for depressing engagement thereby and release from said cam plate means whereby sliding movement subsequently imparted to said cam plate means will be unimparted.

6.. In a multiple bolt mechanism as defined in claim 5 wherein a releasable spring means bias said stop member against said cam plate means.

7. In a multiple bolt mechanism as defined in claim 3 wherein said releasable retaining means includes a pair of opposed extension stop members mounted on said cam plate means adapted to engage said cam followers when said opposed bolts are in engagement with said keepers and prevent dislodgement of said bolts from said keepers. 

